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add setparams prefix

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This commit is contained in:
BVK Chaitanya 2010-09-03 22:28:16 +05:30
parent 9284756e17
commit e89f9ec539
1 changed files with 60 additions and 3 deletions
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63
grub-core/commands/menuentry.c
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@ -53,7 +53,7 @@ static struct
static grub_err_t
append_menu_entry (int argc, const char **args, char **classes,
const char *users, const char *hotkey,
const char *sourcecode)
const char *prefix, const char *sourcecode)
{
unsigned i;
int menu_hotkey = 0;
@ -72,7 +72,7 @@ append_menu_entry (int argc, const char **args, char **classes,
last = &menu->entry_list;
menu_sourcecode = grub_strdup (sourcecode);
menu_sourcecode = grub_xasprintf ("%s%s", prefix ?: "", sourcecode);
if (! menu_sourcecode)
return grub_errno;
@ -171,11 +171,63 @@ append_menu_entry (int argc, const char **args, char **classes,
return grub_errno;
}
static char *
setparams_prefix (int argc, char **args)
{
int i;
int j;
char *p;
char *result;
grub_size_t len = 10;
static const char *escape_characters = "\"\\";
auto char *strescpy (char *, const char *, const char *);
char * strescpy (char *d, const char *s, const char *escapes)
{
while (*s)
{
if (grub_strchr (escapes, *s))
*d++ = '\\';
*d++ = *s++;
}
*d = '\0';
return d;
}
/* Count resulting string length */
for (i = 0; i < argc; i++)
{
len += 3; /* 3 = 1 space + 2 quotes */
p = args[i];
while (*p)
len += grub_strchr (escape_characters, *p++) ? 2 : 1;
}
result = grub_malloc (len + 2);
if (! result)
return 0;
grub_strcpy (result, "setparams");
i = 9;
for (j = 0; j < argc; j++)
{
result[i++] = ' ';
result[i++] = '"';
i = strescpy (result + i, args[j], escape_characters) - result;
result[i++] = '"';
}
result[i++] = '\n';
result[i] = '\0';
return result;
}
static grub_err_t
grub_cmd_menuentry (grub_extcmd_context_t ctxt, int argc, char **args)
{
char ch;
char *src;
char *prefix;
unsigned len;
grub_err_t r;
@ -189,12 +241,17 @@ grub_cmd_menuentry (grub_extcmd_context_t ctxt, int argc, char **args)
ch = src[len - 1];
src[len - 1] = '\0';
prefix = setparams_prefix (argc - 1, args);
if (! prefix)
return grub_errno;
r = append_menu_entry (argc - 1, (const char **) args,
ctxt->state[0].args, ctxt->state[1].arg,
ctxt->state[2].arg, src + 1);
ctxt->state[2].arg, prefix, src + 1);
src[len - 1] = ch;
args[argc - 1] = src;
grub_free (prefix);
return r;
}